3a0a30b10431865527211be80ad188210d24f01b9c3693371b5c6e8138ff9da0

Analysis

max time kernel
133s
max time network
123s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
25-05-2024 04:31

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General

Target

2024-05-25_6eba491c9f44a8bfa4eaa76def8209d4_cryptolocker.exe
Size

56KB
MD5

6eba491c9f44a8bfa4eaa76def8209d4
SHA1

6f17030f7ac83cede8a2521f5951d2fee7a4e606
SHA256

3a0a30b10431865527211be80ad188210d24f01b9c3693371b5c6e8138ff9da0
SHA512

0ffdbc81eb690724dd90b93aa1ae6f698e14d2511bed637492fe8f9a8885bdb5302aa671232bd5b29b5a6875bb72055f5a580bb2ec44e37565e0cca3250755bf
SSDEEP

768:bP9g/WItCSsAfFaeOcfXVr3BPOz5CFBmNuFgUjlL:bP9g/xtCS3Dxx0Y

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral2/memory/4180-0-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000022f51-13.dat	CryptoLocker_rule2
behavioral2/memory/2576-19-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 3 IoCs

resource	yara_rule
behavioral2/memory/4180-0-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
behavioral2/files/0x0008000000022f51-13.dat	UPX
behavioral2/memory/2576-19-0x0000000000400000-0x000000000040E000-memory.dmp	UPX

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	gewos.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	2024-05-25_6eba491c9f44a8bfa4eaa76def8209d4_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2576	gewos.exe

UPX packed file 3 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/4180-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral2/files/0x0008000000022f51-13.dat	upx
behavioral2/memory/2576-19-0x0000000000400000-0x000000000040E000-memory.dmp	upx

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4180 wrote to memory of 2576	4180	2024-05-25_6eba491c9f44a8bfa4eaa76def8209d4_cryptolocker.exe	83
PID 4180 wrote to memory of 2576	4180	2024-05-25_6eba491c9f44a8bfa4eaa76def8209d4_cryptolocker.exe	83
PID 4180 wrote to memory of 2576	4180	2024-05-25_6eba491c9f44a8bfa4eaa76def8209d4_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-05-25_6eba491c9f44a8bfa4eaa76def8209d4_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-25_6eba491c9f44a8bfa4eaa76def8209d4_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4180
- C:\Users\Admin\AppData\Local\Temp\gewos.exe
  "C:\Users\Admin\AppData\Local\Temp\gewos.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  PID:2576

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\gewos.exe

Filesize
56KB

MD5
7a6e26434763c0d25bf256ab45e44438

SHA1
01114567b1e4b7e45ba33f8d3d861526bd157930

SHA256
4692517856668b54f1d0568a9c8119357897263704bf72386316d99aa0afee1b

SHA512
782cdac755a7ae1b6a0cad384d4648045bfc4e01ee307fa0fd83f7de6cc6faa9a778e58e8df7334d69d632b99a7737451fa670b9252a52fe52ec680ef0bcd2ac

Download Submit
C:\Users\Admin\AppData\Local\Temp\gewosik.exe

Filesize
185B

MD5
7a2b78bd125bcf52104720c1b50f8174

SHA1
5e61069ba07e1eaeaf29fade3c1b42c197005496

SHA256
6eca873abff3488f3938f5cf1f11dd617df8fd2dbd70488ab265f8ab0a14ad47

SHA512
06a85cd533a8ac3bdce0a9cb2e865afb46a8dcf8a38a9a0b942996f8166ba045332dafa102c0badc6249d26e8d21b363f9d1e2306f9d954ba8bd4459fe2e6d54

Download Submit
memory/2576-19-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/4180-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/4180-1-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/4180-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/4180-9-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download